... traumatic hemorrhage, heatstroke, itch, headache, strain, scald and fatigue d) Hot compress: alleviate rheumatic pain, neural pain, sciatica, vertebral pain, improve ... surgery 2) Instructions: a) For cold compress: put the cold/hot bag into freezer to be refrigerated for half an hour before ... taking out for use b) For hot compress: put the cold/hot bag into microwave oven to be warm for 100 ...